nws: add get

A thin HTTP GET wrapper for hitting NWS API endpoints.

1 files changed, 91 insertions, 1 deletions

diff --git a/nws/nws_test.go b/nws/nws_test.go
index ffa05c8..bac3d83 100644
--- a/nws/nws_test.go
+++ b/nws/nws_test.go
@@ -3,7 +3,13 @@
 
 package nws
 
-import "testing"
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
 
 func TestPoints(t *testing.T) {
 	// Test valid lat,lng.
@@ -142,3 +148,87 @@ func TestGetForecastHourly(t *testing.T) {
 		}
 	}
 }
+
+func TestNWSGetWrapper(t *testing.T) {
+	// Initialize test NWS server.
+	fails := 0
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if fails > 0 {
+			fails -= 1
+			http.Error(w, `{"type":"urn:noaa:nws:api:UnexpectedProblem","title":"Unexpected Problem","status":500,"detail":"An unexpected problem has occurred.","instance":"urn:noaa:nws:api:request:493c3a1d-f87e-407f-ae2c-24483f5aab63","correlationId":"493c3a1d-f87e-407f-ae2c-24483f5aab63","additionalProp1":{}}`, 500)
+			return
+		}
+		// Success.
+		fmt.Fprintln(w, `{"@context":[],"properties":{"gridId":"CLE","gridX":82,"gridY":64,"forecast":"https://api.weather.gov/gridpoints/CLE/82,64/forecast","forecastHourly":"https://api.weather.gov/gridpoints/CLE/82,64/forecast/hourly","relativeLocation":{"properties":{"city":"Cleveland","state":"OH"}}}}`)
+	}))
+	defer ts.Close()
+
+	// Test 1 - Server fails 5 times.
+	fails = 5
+	_, err := get(ts.URL)
+	if err != nil {
+		t.Errorf("get failed: %v", err)
+		return
+	}
+
+	// Test 2 - Server fails 6 times.
+	fails = 6
+	respBody, err := get(ts.URL)
+	if err == nil {
+		t.Errorf("get did not fail: %s", respBody)
+		return
+	}
+	if err != nil && respBody != nil {
+		t.Errorf("body is not nil: %s", respBody)
+	}
+	if err.Title != "Unexpected Problem" {
+		t.Errorf("err title: %s", err.Title)
+		return
+	}
+	if err.Type != "urn:noaa:nws:api:UnexpectedProblem" {
+		t.Errorf("err type: %s", err.Type)
+		return
+	}
+	if err.Status != 500 {
+		t.Errorf("err status: %d", err.Status)
+		return
+	}
+	if err.Detail != "An unexpected problem has occurred." {
+		t.Errorf("err detail: %s", err.Detail)
+		return
+	}
+
+	// Test 3 - Server fails 1 time.
+	fails = 1
+	respBody, err = get(ts.URL)
+	if err != nil {
+		t.Errorf("get failed: %v", err)
+		return
+	}
+	if respBody == nil {
+		t.Errorf("body: %s", respBody)
+		return
+	}
+	point := new(Point)
+	jerr := json.Unmarshal(respBody, point)
+	if jerr != nil {
+		t.Errorf("points: decode: %v", jerr)
+		return
+	}
+	if point.Properties.Forecast == "" {
+		t.Errorf("points: forecast empty")
+		return
+	}
+	if point.Properties.ForecastHourly == "" {
+		t.Errorf("points: forecasthourly empty")
+		return
+	}
+	if point.Properties.RelativeLocation.Properties.City == "" {
+		t.Errorf("points: city empty")
+		return
+	}
+	if point.Properties.RelativeLocation.Properties.State == "" {
+		t.Errorf("points: state empty")
+		return
+	}
+}